Abstract
A galvanizing simulator with rapid spot cooling was used to obtain a well-characterized reaction times as short as 2 seconds in order to study the short-time microstructural development and kinetics of the galvanizing and galvannealing interfacial reaction layer. It was determined that the incubation and nucleation events of the interfacial layer formation were completed by the 2-second reaction time in all cases. For a 0.20 wt pct dissolved Al bath, FeAl3 nucleates and grows during the initial stages of interfacial layer formation followed by Fe2Al5Zn X formation by diffusion-controlled transformation and growth. The final microstructure of the interfacial layer consisted of Fe2Al5Zn X in a two-layer arrangement comprising a fine-grained, compact lower layer with a coarser, noncompact upper layer. The Al content of the interfacial layer increased with reaction time and reaction temperature. Both of the Fe-Al phases formed exhibited a strong preferential crystallographic orientation with respect to the substrate surface. The evolution of the interfacial layer formed in a 0.13 wt pct dissolved Al bath was the result of competing processes. Fe-Al phases formed and grew during the reaction times explored, per the preceding mechanism. However, Fe-Zn phases also nucleated and grew during the reaction times explored via the process of inhibition breakdown, with these phases dominating the interfacial layer microstructures at longer reaction times. In this case, the Al content of the interfacial layer increased for all reaction times explored, but decreased with increasing reaction temperature, due to the more rapid initiation of inhibition breakdown. A model to describe the interfacial layer growth kinetics as a function of reaction time, bath temperature, and inhibition layer microstructure for the case of the 0.20 wt pct dissolved Al bath was proposed. It indicated that the development of microstructure of the interfacial layer had significant influence on the effective diffusion coefficient and growth rate of this layer.
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References
A.R. Marder: Prog. Mater. Sci., 2000, vol. 45, pp. 191–271
Y. Lepretre and J.M. Mataigne: Galvatech ’98 Conf. Proc., Chiba, Japan, 1998, The Iron and Steel Institute of Japan, Tokyo, Japan, 1998, pp. 133–40
M. Guttmann: Mater. Sci. Forum, 1994, vols. 155–156, pp. 527–48
P. Toussaint, L. Segers, R. Winand, and M. Dubois: Zinc-Based Steel Coating Systems: Production and Performance, TMS Annual Meeting, San Antonio, TX, 1998, F.E. Goodwin, ed., TMS, Warrendale, PA, 1998, pp. 27–37
P. Toussaint, L. Segers, R. Winand, and M. Dubois: Galvatech ’98 Conf. Proc., Chiba, Japan, 1998, The Iron and Steel Institute of Japan, Tokyo, Japan, 1998, pp. 141–47
P. Toussaint, L. Segers, R. Winand, M. Dubois: ISIJ Int., 1998, vol. 38, pp. 985–90
M. Isobe: CAMP-ISIJ, 1992, vol. 5, pp. 1629–32
N. Tang: Metall. Mater. Trans. A, 1995, vol. 26A, pp. 1699–1704
E. Baril, G. L'Esperance: Metall. Mater. Trans. A, 1999, vol. 30A, pp. 681–95
S. Belisle: The Physical Metallurgy of Zinc Coated Steel, TMS Annual Meeting, San Francisco, CA, 1993, A.R. Marder, ed., TMS, Warrendale, PA, 1993, pp. 65–74
M. Dubois: Galvatech’04 Conf. Proc., Chicago, IL, 2004, Association for Iron and Steel Technology, Warrendale, PA, 2004, pp. 1079–88
M. Dubois and S. Feron: The Physical Metallurgy of Zinc Coated Steel, TMS Annual Meeting, San Francisco, CA, 1993, A.R. Marder, ed., TMS, Warrendale, PA, 1993, pp. 55–64
J. Faderl, W. Masche, and J. Strutzenberger: Galvatech '95 Conf. Proc., Chicago, IL, 1995, The Iron and Steel Society, Warrendale, PA, 1995, pp. 675–85
E. Baril, G. L'Esperance, and E. Boutin: Galvatech ’98 Conf. Proc., Chiba, Japan, 1998, The Iron and Steel Institute of Japan, Tokyo, Japan, 1998, pp. 168–73
G.J. Harvey, P.D. Mercer: Metall. Trans., 1973, vol. 4, pp. 619–21
S. Lin and M. Meshii: Galvatech '95 Conf. Proc., Chicago, IL, 1995, The Iron and Steel Society, Warrendale, PA, 1995, pp. 335–41
E. McDevitt, Y. Morimoto, M. Meshii: ISIJ Int., 1997, vol. 37, pp. 776–82
Y. Morimoto, E. McDevitt, M. Meshii: ISIJ Int., 1997, vol. 37, pp. 906–13
P. Perrot, J. Tissier, J. Dauphin: Z. Metallkd., 1992, vol. 83, pp. 786–90
J.R. McDermid, M.H. Kaye, W.T. Thompson: Metall. Mater. Trans. B, 2007, vol. 38B, pp. 215–30
L. Chen, R. Fourmentin, and J.R. McDermid: Galvatech ’07 Conf. Proc., Osaka, Japan, 2007, The Iron and Steel Institute of Japan, Tokyo, Japan, 2007, pp. 321–26
M. Guttmann, Y. Lepretre, A. Aubry, M.J. Roch, T. Moreau, P. Drillet, J.M. Mataigne, and H. Baudin: Galvatech '95 Conf. Proc., Chicago, IL, 1995, The Iron and Steel Society, Warrendale, PA, 1995, pp. 295–307
K. Schubert, U. Roesler, M. Kluge, K. Anderko, L. Haerle: Naturwissenschaften, 1953, vol. 40, pp. 437–40
P. Black: Acta Cryst., 1955, vol. 8, pp. 43–47
Z.W. Chen, R.M. Sharp, J.T. Gregory: Mater. Forum, 1990, vol. 14, pp. 130–36
C.E. Jordan, A.R. Marder: J. Mater. Sci., 1997, vol. 32, pp. 5593–5602
Y. Lepretre, J.M. Mataigne, M. Guttmann, and J. Philibert: Zinc-Based Steel Coating Systems: Production and Performance, TMS Annual Meeting, San Antonio, TX, 1998, F.E. Goodwin, ed., TMS, Warrendale, PA, 1998, pp. 95–114
E. Baril, M. Gaug, and J.R. McDermid: Galvatech ’04 Conf. Proc., Chicago, IL, 2004, Association for Iron & Steel Technology, Warrendale, PA, 2004, pp. 927–37
J.R. McDermid, E. Baril, and F.E. Goodwin: Galvatech ’04 Conf. Proc., Chicago, IL, 2004, Association for Iron and Steel Technology, Warrendale, PA, 2004, pp. 855–69
F. Ajersch, F. Ilinca, J.-F. Hétu: Metall. Mater. Trans. B, 2004, vol. 35B, pp. 171–78
J. Nakano, D.V. Malakov, S. Vamaguchi, G.R. Purdy: Comput. Coupl. Phase Diag. Thermochem., 2007, vol. 31, pp. 125–40
R. Herchl, N.N. Khoi, T. Homma, W.W. Smeltzer: Oxid. Met., 1972, vol. 6, pp. 435–46
J.M. Perrow, W.W. Smeltzer, J.D. Embury: Acta Metall., 1968, vol. 16, pp. 1209–18
J.M. Perrow, W.W. Smeltzer, R.K. Ham: Acta Metall., 1967, vol. 15, pp. 577–79
W.W. Smeltzer, R.R. Haering, J.S. Kirkaldy: Acta Metall., 1961, vol. 9, p. 8
Acknowledgments
The authors thank Jason Lavallée, galvanizing simulator technologist. Grateful acknowledgement is given to Stelco Inc., the Natural Sciences and Engineering Research Council of Canada (NSERC), and members of the McMaster Steel Research Center for their financial support of this research through their funding of the Stelco/NSERC Industrial Research Chair in Steel Product Application and for providing the experimental substrates.
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Manuscript submitted August 29, 2007.
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Chen, L., Fourmentin, R. & Mc Dermid, J. Morphology and Kinetics of Interfacial Layer Formation during Continuous Hot-Dip Galvanizing and Galvannealing. Metall Mater Trans A 39, 2128–2142 (2008). https://doi.org/10.1007/s11661-008-9552-z
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DOI: https://doi.org/10.1007/s11661-008-9552-z